Due to its intense nature, preparing for this event requires at least 12 months of workout prior to the competition. Even mid tier athletes frequently use the services of a boulder personal trainer - Boulder has been a training hub for serious triathletes for over twenty years.
This nationally televised event usually attracts a new set of athletes each year ready to tackle the triple-threat challenge.
There are many different exercise routines that can achieve fantastic results. The style you use is largely up to you.
However, Crossfit training is a great way to put in a solid base with personal training Boulder coaches.